Stationary X
... 6. Comply with insert thermal parameters, planning and programming the exposure parameters and cooling pauses. Housing or self-contained units must be provided with an adequate thermic protection. 7. Voltages indicated in charts are valid for transformer supplied with ground center. 8. It is extreme ...
... 6. Comply with insert thermal parameters, planning and programming the exposure parameters and cooling pauses. Housing or self-contained units must be provided with an adequate thermic protection. 7. Voltages indicated in charts are valid for transformer supplied with ground center. 8. It is extreme ...
Determining the electron charge to mass ratio (e/m)
... The key component in this experiment is a special glass fine-beam electron tube (Fadenstrahlrohr LEIFI-Physik) also known as a “Teltron electron beam tube” (previously manufactured by Teltron Inc). The evacuated glass tube contains a small amount of an inert gas which lights up upon electron impact ...
... The key component in this experiment is a special glass fine-beam electron tube (Fadenstrahlrohr LEIFI-Physik) also known as a “Teltron electron beam tube” (previously manufactured by Teltron Inc). The evacuated glass tube contains a small amount of an inert gas which lights up upon electron impact ...
Chapter 2 Voltage and Current Atomic Theory
... insulators High voltage will cause an insulator to break down and conduct ...
... insulators High voltage will cause an insulator to break down and conduct ...
O19e
... Coil radius r: 150 mm Distance between the coils a: 150 mm Maximum current IS through the coils: 2 A Measuring device It consists of two parts, one with a mirror and the other with two riders, for measuring the diameter of the electron beam when it is made to follow a circular path. The experiments ...
... Coil radius r: 150 mm Distance between the coils a: 150 mm Maximum current IS through the coils: 2 A Measuring device It consists of two parts, one with a mirror and the other with two riders, for measuring the diameter of the electron beam when it is made to follow a circular path. The experiments ...
Thermions - Assam Valley School
... (iv) Threshold temperature : The minimum temperature at which a particular material emits thermions from its surface on heating is called threshold temperature. 3. (a) Can a metal emit thermions at all temperatures? Explain your answer. (b) Calculate the value of 500 electron volts in joules. Ans. ( ...
... (iv) Threshold temperature : The minimum temperature at which a particular material emits thermions from its surface on heating is called threshold temperature. 3. (a) Can a metal emit thermions at all temperatures? Explain your answer. (b) Calculate the value of 500 electron volts in joules. Ans. ( ...
Cavity magnetron
The cavity magnetron is a high-powered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field while moving past a series of open metal cavities (cavity resonators). Bunches of electrons passing by the openings to the cavities excite radio wave oscillations in the cavity, much as a guitar's strings excite sound in its sound box. The frequency of the microwaves produced, the resonant frequency, is determined by the cavities' physical dimensions. Unlike other microwave tubes, such as the klystron and traveling-wave tube (TWT), the magnetron cannot function as an amplifier, increasing the power of an applied microwave signal, it serves solely as an oscillator, generating a microwave signal from direct current power supplied to the tube.The first form of magnetron tube, the split-anode magnetron, was invented by Albert Hull in 1920, but it wasn't capable of high frequencies and was little used. Similar devices were experimented with by many teams through the 1920s and 30s. On November 27, 1935, Hans Erich Hollmann applied for a patent for the first multiple cavities magnetron, which he received on July 12, 1938, but the more stable klystron was preferred for most German radars during World War II. The cavity magnetron tube was later improved by John Randall and Harry Boot in 1940 at the University of Birmingham, England. The high power of pulses from their device made centimeter-band radar practical for the Allies of World War II, with shorter wavelength radars allowing detection of smaller objects from smaller antennas. The compact cavity magnetron tube drastically reduced the size of radar sets so that they could be installed in anti-submarine aircraft and escort ships.In the post-war era the magnetron became less widely used in the radar role. This was because the magnetron's output changes from pulse to pulse, both in frequency and phase. This makes the signal unsuitable for pulse-to-pulse comparisons, which is widely used for detecting and removing ""clutter"" from the radar display. The magnetron remains in use in some radars, but has become much more common as a low-cost microwave source for microwave ovens. In this form, approximately one billion magnetrons are in use today.